(1)cos²﹙x0＋π/12﹚=1/2cos(2x0+π/6)+1/2=0cos(2x0+π/6)=-1 2x0=2kπ+5π/6g﹙x0﹚=1+1/2sin2x0=1+1/4=5/4(2)h(x)=f(x)+g(x)=cos²﹙x＋π/12﹚+1+1/2sin2x=1/2cos(2x+π/6)+1/2sin2x+3/2=√3/4cos2x...